package com.sky.aspect;

import com.google.j2objc.annotations.J2ObjCIncompatible;
import com.sky.anno.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import lombok.val;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;
import java.util.Map;

@Aspect
@Component
@Slf4j
public class AutoFIllAspect {

    @Before("@annotation(com.sky.anno.AutoFill)")
    public void autoFIll(JoinPoint joinPoint) throws NoSuchMethodException {
        log.info("开始进行公共字段自动填充");
    //1. 获取目标方法上的注解，并拿到注解里属性值

        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        Method method = methodSignature.getMethod(); //方法对象
        AutoFill AutoFill = method.getAnnotation(AutoFill.class);
        OperationType operationType = AutoFill.value();


    //2。获取到目标方法的参数对象
        Object[] args = joinPoint.getArgs();
        //防止注解到无参数的方法以防索引越界
        if (args.length == 0 || args[0] == null) {
            return;
        }
        Object entity = args[0]; //拿到的就是实体对象

    //3.判断注解中属性值，如果是INSERT,就补充四个字段（创建时间，更新时间，创建人，更新人）
        try {
            if (operationType == OperationType.INSERT) {
                //通过反射取补充属性值
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setCreateTime.invoke(entity, LocalDateTime.now());
                setUpdateTime.invoke(entity, LocalDateTime.now());
                setCreateUser.invoke(entity, BaseContext.getCurrentId());
                setUpdateUser.invoke(entity, BaseContext.getCurrentId());
            }else if (operationType == OperationType.UPDATE) {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(entity, LocalDateTime.now());
                setUpdateUser.invoke(entity, BaseContext.getCurrentId());

            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        //4.判断注解中属性值，如果是UPDATE，就补充字段（更新时间，更新人）
}
}
